Astronomy and Astrophysics – Astrophysics
Scientific paper
Jan 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008aipc..968..185w&link_type=abstract
ASTROPHYSICS OF COMPACT OBJECTS: International Conference on Astrophysics of Compact Objects. AIP Conference Proceedings, Volum
Astronomy and Astrophysics
Astrophysics
1
Supernovae, Pulsars, Stellar Structure, Interiors, Evolution, Nucleosynthesis, Ages
Scientific paper
26Al is an unstable isotope with the mean lifetime of 1 Myr. It is mainly synthesized in massive stars, before and during their evolution to core-collapse supernovae. Since the gamma-ray line is transparent to the interstellar medium, studies of 26Al could probe the nucleosynthesis activity and supernova explosions in the whole Galaxy in last few million years. INTEGRAL/SPI has a high spectral resolution to study the 1809 keV gamma-ray line from 26Al. We have detected 26Al from the Galactic plane and nearby star-formation regions. From 26Al measurements, we obtain the current Galactic core-collapse supernova rate of 1.9 events per century. Correlation between the distribution of 26Al candidate sources and the distributions of detected SNRs and pulsars in the Galaxy is discussed.
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